Batumi in January

April through October gives you the sweet spot – dry weather, calm seas, and water visibility that makes the coral reefs look like they're lit from within. The humpback whales show up between June and November, turning your morning coffee into a wildlife documentary. But here's the trade-off: July and August bring South African school holidays, which means higher prices and busier beaches. May and September offer the best balance – great weather, fewer crowds, and reasonable rates. December through March brings the rains and rough seas that can cancel boat trips and diving excursions. The heat gets oppressive too. Skip it unless you're chasing the cheapest possible rates.